\begin{tabular}{lcccccc} \hline
 & (1) & (2) & (3) & (4) & (5) & (6) \\
VARIABLES & Aggr. OLS & Aggr. IV & Subm. OLS & Subm. IV & Conv. OLS & Conv. IV \\ \hline
 &  &  &  &  &  &  \\
ln $\Delta$ IPW (91-07) & 0.104*** & 0.106*** & 0.036 & 0.041 & 0.060* & 0.054 \\
 & (0.030) & (0.031) & (0.027) & (0.030) & (0.034) & (0.035) \\
Female & -0.013 & -0.013 & 0.024 & 0.024 & 0.070** & 0.070** \\
 & (0.041) & (0.041) & (0.035) & (0.035) & (0.034) & (0.034) \\
Age & 0.006*** & 0.006*** & -0.000 & -0.000 & 0.011*** & 0.011*** \\
 & (0.001) & (0.001) & (0.001) & (0.001) & (0.001) & (0.001) \\
Higher Cert. & -0.207*** & -0.207*** & -0.023 & -0.023 & -0.088* & -0.088* \\
 & (0.055) & (0.055) & (0.057) & (0.057) & (0.052) & (0.051) \\
University & -0.356*** & -0.356*** & -0.113** & -0.112** & -0.229*** & -0.230*** \\
 & (0.049) & (0.048) & (0.047) & (0.047) & (0.033) & (0.033) \\
Married & 0.113*** & 0.113*** & 0.106*** & 0.106*** & 0.089** & 0.089** \\
 & (0.035) & (0.035) & (0.031) & (0.031) & (0.039) & (0.039) \\
\% non-UK born & -0.004** & -0.004** & -0.001 & -0.001 & 0.003 & 0.003 \\
 & (0.002) & (0.002) & (0.002) & (0.002) & (0.002) & (0.002) \\
$\Delta$ \% non-UK born & 0.005** & 0.005** & 0.002 & 0.002 & -0.001 & -0.001 \\
 & (0.002) & (0.002) & (0.002) & (0.002) & (0.002) & (0.002) \\
 &  &  &  &  &  &  \\
Observations & 1,793 & 1,793 & 1,793 & 1,793 & 1,793 & 1,793 \\
R-squared & 0.111 & 0.111 & 0.016 & 0.016 & 0.129 & 0.129 \\
 TTWAs & 239 & 239 & 239 & 239 & 239 & 239 \\ \hline
\multicolumn{7}{c}{ Robust standard errors in parentheses} \\
\multicolumn{7}{c}{ *** p$<$0.01, ** p$<$0.05, * p$<$0.1} \\
\end{tabular}
